ISO-9199 › Aerospace - Nuts, bihexagonal, self-locking, MJ threads, classifications: 1 100 MPa (at ambient temperature)/425 degrees C, 1 100 MPa (at ambient temperature)/650 degrees C, 1 210 MPa (at ambient temperature)/425 degrees C, 1 210 MPa (at ambient temperature)/730 degrees C, 1 550 MPa (at ambient temperature)/235 degrees C, 1 550 MPa (at ambient temperature)/425 degrees C and 1 550 MPa (at ambient temperature)/600 degrees C - Dimensions
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This International Standard specifies the dimensions of bihexagonal nuts with counterbore and MJ threads and a self-locking feature achieved by forming the upper portion out-of-round, for classifications: 1100 MPa1)/425 °C2), 1100 MPa1)/650 °C2), 1210 MPa1)/425 °C2), 1210 MPa1)/730 °C2), 1550 MPa1)/235 °C2), 1550 MPa1)/425 °C2)and 1550 MPa1)/600 °C2).
This International Standard is only applicable for the compilation of aerospace product standards.
1) Corresponds to the minimum tensile stress which the nut is able to withstand at ambient temperature without breaking or cracking when tested with a bolt of a higher strength class.
2) Maximum temperature that the nut is able to withstand, without permanent alteration to its original characteristics, after ambient temperature has been restored. The maximum temperature is conditioned by the material or by the surface treatment.
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Document Number
ISO 9199:1998
Revision Level
2ND EDITION
Status
Current
Publication Date
March 15, 1998
Committee Number
ISO TC 20/SC 4